X220 Hackintosh - Stability issue - screen locks but mouse still active? (High Sierra)

I've followed the guide at x220.mcdonnelltech.com to setup a nearly perfect High Sierra hackintoshed X220 - I only have a strange issue where once in a while, the system just completely locks up and the screen is unresponsive (although the trackpoint/cursor still moves, and caps lock still works). The only way out is a hard reset.

At first I thought it was a lack of memory (screen distortions occurring on 4g ram), but after upgrading to 16g ram I still had this issue.

I've tried looking into my console for any relevant messages around the time of the crash but can never seem to find anything useful in there?

Has anyone encountered an issue like this, or know how to go about debugging it?

submitted by /u/wafflwaffl
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